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mechanical noise after unlocking

Discussion in 'Gen 3 Prius Main Forum' started by asteros, Sep 18, 2016.

  1. asteros

    asteros New Member

    Joined:
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    Location:
    Oregon
    Vehicle:
    2015 Prius
    Model:
    Two
    Does anyone know what the mechanical noise is after unlocking and opening the driver door? It is definitely noticeable and lasts for about 10sec. Is it some sort of initializing the electric motor?
     
    #1 asteros, Sep 18, 2016
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    no, it is the brake accumulator. it happens when driving also, when it needs to be replenished. but it's harder to hear over other noise.
     
    #2 bisco, Sep 18, 2016
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  3. Piotrus Pan

    Piotrus Pan Member

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    Dec 1, 2014
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    Location:
    Luxembourg
    Vehicle:
    2010 Prius
    Model:
    III
    Prius has Power Braking even when the car is OFF, it activates when you open the driver door. What you hear is the compressor for brakes working till it reaches proper pressure.
    It's great, you got power brakes with the car off but it's bad if you want to work on your brakes cause if you forget to unplug the 12V you might have a bad time ;-)
     
    #3 Piotrus Pan, Sep 18, 2016
    Last edited: Sep 19, 2016
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